Please dont go through the negative comments if you are going to upgrade your phone with a comparatively lower specs to a higher one. Believe me this is why its been called as flagship killer.
Pros:-
1080p Display, great viewing of movies.
Excellent camera quality, dont believe them who says camera quality is not up to the mark.
Motion camera for slow-mo videos and time-lapse videos.
Great battery life. This is dependent on your usage though.(even after heavy usage it performs pretty well)
Premium build quality, it feels great in hands.(even an IPhone will not feel that premium, the idea of sandstone finish was amazingly aweeesomee.).
Performance - a pure pleasure, can handle anything without any issues.
3 microphones for impressive sound clarity while speaking.
Excellent volume and sound quality of speakers. True stereo, Great Loudness without compromising on quality.
Cons-
- Some heating issues exists after gaming for extended hours or usage of Wifi/LTE.
This is however true of most smartphones in market.
- Cyanogen gallery is little slow in loading the media from local storage.
Summarizing all, its a great buy for sure. You wont regret it at any point of time(apparently I havent). Pros will give you so much that you will definitely ignore the cons.
I dont think I need to mention anything about Flipkarts delivery, it was as usually great but team you could have spent a little time on packaging I mean using a cello-tape and wrapping it all over the two boxes makes it too tacky and stupid.